Merge pull request #61 from BarAgent/dep-0007

Updated DEP-007 document with finalized reference implementation and spec.
Merge pull request #62 from dylan-lang/dep-0007

Suggested edits.
Updated; not in 2013.2 release.
Merge pull request #63 from BarAgent/master

Changed target release of DEP-0007 from 2013.2 release.